Lost Jitte + Karn's Bastion + Cryptic Trilobite + Loading Zone

Lost Jitte

Karn's Bastion

Cryptic Trilobite

Loading Zone

How it works

1. Activate Karn's Bastion by paying 4, putting a charge counter on Lost Jitte and two +1/+1 counters on Cryptic Trilobite.
2. Activate Cryptic Trilobite's first ability twice by removing two +1/+1 counters from it, adding CCCC that can only be spent to activate abilities.
3. Activate Lost Jitte by removing a charge counter from it, untapping Karn's Bastion.
4. Repeat.

This ingenious loop turns a modest combat artifact into an infinite engine of growth by leaning heavily on a few key amplifiers and batteries. Once you have Loading Zone on the board, its replacement effect doubles every single counter you generate, turning a single activation of Karn's Bastion into a surplus of counters. Cryptic Trilobite serves as your specialized energy source, utilizing its ability to trade its own +1/+1 counters for restricted mana to fund Karn's Bastion and Lost Jitte. Finally, Lost Jitte steps in to untap Karn's Bastion using its own charge counters, allowing the entire sequence to repeat indefinitely for infinite proliferate.